Jellia Jamb
Jellia Jamb was a resident of the Land of Oz, who appeared as “a small girl in a green dress”.
In one universe, when Acquaintanceship-982 visited Oz and was brought to the Emerald Palace by Omby Amby (who had been tasked with finding Tik-Tok and bringing him back to the Palace), he was delivered to Jellia, who was part of the Palace staff. Though she realised instantly that he was not Tik-Tok, she did bring him upstairs to Ozma. (PROSE: The Crew of the Copper-Colored Cupids in Oz)
Behind the scenes
Jellia Jamb debuted in the original 1900 Wonderful Wizard of Oz novel. As such, she is now in the public domain. Her species was never clarified by Baum, but her short height and green hair likely mark her out as some form of non-human, possibly the same species as the Guardian of the Gates.